heisler



C. L. HEISLER.

A GEARING.

APPLICATION FILED 0CT.20, 1920.

1,434,697. Patented Nov. 11922;;

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Inventor: CharlesLI-Ieisler;

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cl L. HEISLER.

GEARING.

- APPLICATION msn ocTfzo. 1920.

Patented Nov. 7, 1922:v

. r) ZQa/v/V I-I s Attorney Patented Nov. 7, 1922.

Unirse STATES rarer korinar..

CHARLES L. HEISLER, OF SCHENECTADY, YORK, ASSIGNOR TO GENERAL ELECTRIC COMPAY, A CORPORATION OIF NEW YORK.

GEARING.

Application led October 20, 1920. Serial No. 418,132.

To all whom it may concern.'

Be it known that I, CHARLES L. IInIsLnn, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Gearing, of

which the following is a specification. j

'The present invention relates to gearing and particularly gearing of the type where in power is transmitted between a high speed pinion and a low speed gear by two or more sets of intermediate speed gear wheels which transmit the load in parallel,l each set comprising a high speed gear wheel an `improved structure and arrangement in a gearing of thetype referred to, and for a consideration of what I believe to be novel and my invention, attention is directed to the accompanying description and .the claims appended thereto. j f

In the drawing, Fig. 1- is a horizontal sectional view of a gearing embodying myin-y vention, and Fig. 2 is avertical sectional View thereof.

Referring to thedrawing, 5 indicates the lower half of the gear casing and Gthe upper half, such casing being provided with three sets of bearings 7 8 yand 9, the bearing 7 beingllocated at the axial center ofthe casing and the sets 8 and 9 on opposite sides thereof. In bearings 7 is mounted a hollow shaft 10, which carries a low speed gear wheel 11. Shaft 10 is provided at one end With a flange to which is coupled a driyen shaft 12 of any desired device. @ne applicationk towhich my invention is well adapted is toa gearing for use inship propulsion and in such instance shaft 12 maybe a pro-l peller shaft. In bearings 84 and 9 are located -intermediate speed shaft-s 13 and 14 carrying low speed pinions'15 and 16 which meshy The right hand ends of shafts 13'and 14 project beyond bearings 8 and 9 and mounted on such ends ,are high speed gear wheels 17 and 18, such gear wheels being thus overhung on the shafts. As will be noted, the right hand bearings 8 and 9 are made somewhat longer than the left hand bearings to take care of the greater bearing pressure due to overhungwheels 17 and 18. The two sets of intermediate speed gear wheels comprismg pinions 15 and 16 and gear wheels 17 and 18 are mounted on diametrically opposite sides of low speed gear wheel 11 and located between and meshing with gear wheels 17 and 18 is a high speed pinion 19 carried by a quill shaft 20. Quill shaft 2O extends entirely through hollow low speed shaft 10 and at ythe end of shaft 10 remote from pinion 19 is a bearing 21 for shaft 20. The other end of shaft 20 is carried in a bearing 22 which forms a dampening device lio-preventl chattering or vibration of pinion 19.y Since gear wheels 17 and 18 are located on diametrically opposite sides of pinion 19, such pinion is balanced between them and exerts practically no pressure on its bearings. It is desirable that the pinion be permitted to assume its own position so as to mesh correctly with both gear wheels 17 and 18 and effect an equal division of the load. At the same time, however, the pinionmust be held from chattering or vibrating. The bearing 22 is therefore more in the nature of a vibration preventing means andas showncomprises an inner ring 23 and an outer ring 24 connected together by a number of interleaving friction disks 25 pressed't-oward each other by suitable spring means as indicated at 26. Inner ring 23 carries a bearing lining 27 for shaft 20. Outer ring 24 is carried by a pedestal 28 bolted to lower casing half 5 and braced at its upper end by tie rod 29 which connects to upper casing half 6. With this arrangement pinion 19 can adjust itself axially and also sideways, quill shaft 20 possessing sufficient vflexibility to permit of necessarily small sideways movements. o

'Pinion 19 and gear wheels 17 and 18 are housed in a gear casing extension 30 closed at the end by a cover plate 81.

It will be noted that the right hand bearings 8 and 9 project somewhat in the gear casing extension 3() projecting within the confines of the rim of gear wheels 17 and 1S. This serves to minimize the overhang of gear wheels 17 and 18, bringing them as close to bearings 8 and 9 as possible.

Extending through quill shaft 2O is a high speed shaft 32 which in the case of a reduction gearing is the driving shaft. Shaft 32 is connected to shaft 2O by a suitable axial slip coupling B3 which serves to permit axial adjustment of either pinion 19 or the driving machine for example an elastic fluid turbine, independently of each other.

To ensure correct meshing of the gear' wheels, one of them, as the gea-rwheel 18 may be fastened to its shaft by'a bolted connection as indicated at 34. The holes for bolts 35 may be bored roughly before the gearing is assembled. assembled and put under some torque to bring all the gear wheels into correct meshing position after which the bolt holes are reamed to size and the bolts put into place and tightened.

lilith the above described arrangement I obtain a comparatively small and rigid casing of minimum axial length. Each gear shaft has only two bearings which saves materially in manufacturing cost and makes it much easier to align the gearing. Furthermore, since the bearings for each shaft are close together, any twisting of they casing affects their alignment but little and since the casing is of comparatively small axial length, it will be very rigid ina transverse direct-ion and not likely to twist. This feature is of particular importance in connection with gearing for ship propulsion because of the fact that a ships hull weaves more or less and the foundations provided are not always of a very substantial nature.

ldy the quill shaft arrangement wherein the driving shaft and high speed pinionshaft telescope each other and are both located inside the low speed wheel shaft, I obtain the benefit of a long shaftconnection in a. short structure and this enablesthe driving engine, for example, anv elastic fluid turbine, to be placed' directly adjacent the gearing without difficulty as respects bearing alignment, etc. In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the apparatusshown is only illustrative and that the invention may be carried out by other means.

IVhat I claim as new and desirerto secure by Letters Patent ofthe United States, is:

l. In a gearing` the combination of a casing, a hollow shaft journaled therein, alow speed gear wheel on. rsaid' shaft, a high speed pinion in axial alignment with the low speed gear wheel, a shaft for the pinion The gearing is then which extends through said hollow shaft and is journaled therein at the end of the hollow shaft remote from the pinion, a plurality of intermediate speed shafts journaled in said casing, said last named shafts 'having overhung ends, low speed pnions one end journaled therein at the end of the hollow shaft remote from the pinion, aA vibfration dampening means for holding the other end of said pinion shaft, a plurality of intermediate speed shafts journaled in said casing, said last named shafts having overhung ends, low speed pinions 0n said last named shafts which mesh with said loW speed gear wheel, and high speed gear wheels on said overhung ends which mesh.

with said high speed pinion.

Ina gearing, the combination of a casing having three pairs of bearings arranged` in the same pla-ne, a hollow shaft journaled in the central pair, and intermediate speed shafts having overhung ends journaled inf the two outside pairs, meshing gear wheels? on said shafts, gear wheels mounted on the overhung ends of said outside shaft, a pinion meshing with and balanced between said last named gear wheels, a quill shaft for said pinion which extends through saidY hollow shaft, and a high speed shaft which extends thrpugh said quill shaft" andy is com nected to it at the end remote from the pinion'.-

ll. In combination, a casing, a low speed gearing therein comprising a low speed gear wheel andl two low speed pinions.y shafts for said gear wheel and pinions, the gear wheel shaft being hollow and the pinion shaft extending beyond the Icasing, highI speed gear wheels overhung on the ends of said pinion shafts, a pinion balanced between sa'id high speed gear wheels and ashaft for the pinion which extends through said hollow shaft and has a journal therein.

5; In combination, a casing, a low speedv gearing therein comprising a low speed gear wheel and two low speed pinions, shafts for said gear wheel and pinions, the gear wheelI shaft being hollow and the pinion* shaft ex.- tending beyond the' casing, high speed gear wheels overhung on the ends of said pinion shafts, a pinion balanced between saidv highy speed gear wheels anda shaft for the pinion which extends through said hollow shaft. a journal in the hollow shaft for one end of said last named pinion shaft, and a bearing for the other end of such shaft which forms a vibration preventing means for the high speed pinion.

6. In Combination, a casing, a low speed gearing therein comprising alow speed gear wheel and two low speed pinions, shafts for said gear wheel and pinions, the gear wheel shaft being hollow and the pinion shaft ex-k tending beyond the casing, high speed gear wheels overhung on the ends of said? pinion shafts, a pinion balanced between said high speed gear wheels and a shaft for the pinion which extendsv through said hollow shaft,

and bearings for said last named pinion my hand this 19th day of October, 1920.

shaft, one of which is located in said hollo shaft. f

7. In combinatioma casing, a low speed gearing therein comprising a low speed gear wheel and two low speed pinions, shafts for ysaid gear wheel and pinions the gear wheel shaft being hollow and the pinion shaft extending beyond the casing, high speed gear wheels overhang on the ends of said pinion shafts, a pinion balanced between said high it at the end remote from the high speed pinion.

kIn witness whereof, I have hereunto set CHARLES L. HEISLER. 

